speciosity

Originated 1426–75 from Middle English speciosity (attractive), from Latin speciōsitās (beauty), from speciēs (appearance), + English -ity (noun-forming suffix).

speciosity (countable and uncountable, plural speciosities)

1. (uncountable) The state or quality of being specious.
2. (countable, rare, chiefly in the plural) A specious action, promise, ideology, etc.
   • 1843, Thomas Carlyle, Past and Present, book 2, ch. 8, The Electon

     Till deep misery, if nothing softer will, have driven you out of your Speciosites into your Sincerities; and you find there either is a Godlike in the world, or else ye are an unintelligible madness;

• “speciosity” in The American Heritage Dictionary of the English Language, 4th edition, Boston, Mass.: Houghton Mifflin, 2000, →ISBN.
• “speciosity” in Dictionary.com Unabridged, Dictionary.com, LLC, 1995–present.
• "speciosity" in the Webster's Revised Unabridged Dictionary, MICRA, 1996, 1998.